NOAA/WDS Paleoclimatology - Iberian Margin 420KYr Geochemical and Color Variations Data

browse graphicPaleoclimatology - Paleoceanography
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Paleoceanography. The data include parameters of paleoceanography with a geographic location of North Atlantic Ocean. The time period coverage is from 433300 to 0 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
  • Cite as: Hodell, D.A.; Crowhurst, S.; Skinner, L.C.; Tzedakis, P.C.; Margari, V.; Channell, J.E.T.; Kamenov, G.D.; Maclachlan, S.; Rothwell, G. (2013-12-18): NOAA/WDS Paleoclimatology - Iberian Margin 420KYr Geochemical and Color Variations Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/8kz8-v888. Accessed [date].
  • Please refer to Credit tab for full citation information.
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DistributorNOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact Data Center Contact
NOAA World Data Service for Paleoclimatology
828-271-4800
paleo@noaa.gov
Coverage DescriptionDate Range: 433300 cal yr BP to 0 cal yr BP;
Time Period-431350 to 1950
Spatial Bounding Box Coordinates
N: 37.8815
S: 37.561333
E: -10.142167
W: -10.1762
Spatial Coverage Map
General Documentation
Associated Resources
  • Response of Iberian Margin sediments to orbital and suborbital forcing over the past 420 ka
    • Associated Reference published 2013
      David Hodell, Simon Crowhurst, Luke Skinner, Polychronis C. Tzedakis, Vasiliki Margari, James E.T. Channell, George Kamenov, Suzanne Maclachlan, Guy Rothwell, 2013: Response of Iberian Margin sediments to orbital and suborbital forcing over the past 420 ka. Paleoceanography, 28, 185-199, 10.1002/palo.20017
Publication Dates
  • publication: 2013-12-18
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress StatusComplete - production of the data has been completed
Data Update Frequency Data update frequency not available
Supplemental Information
STUDY NOTES: Sediment geochemical data and color variations from 2 marine sediment cores collected along the southwestern Iberian Margin.
ABSTRACT SUPPLIED BY ORIGINATOR: Here we report 420 kyr long records of sediment geochemical and color variations from the southwestern Iberian Margin. We synchronized the Iberian Margin sediment record to Antarctic ice cores and speleothem records on millennial time scales and investigated the phase responses relative to orbital forcing of multiple proxy records available from these cores. Iberian Margin sediments contain strong precession power. Sediment "redness" (a* and 570-560 nm) and the ratio of long-chain alcohols to n-alkanes (C26OH/(C26OH + C29)) are highly coherent and in-phase with precession. Redder layers and more oxidizing conditions (low alcohol ratio) occur near precession minima (summer insolation maxima). We suggest these proxies respond rapidly to low-latitude insolation forcing by wind-driven processes (e.g., dust transport, upwelling, precipitation). Most Iberian Margin sediment parameters lag obliquity maxima by 7-8 ka, indicating a consistent linear response to insolation forcing at obliquity frequencies driven mainly by high-latitude processes. Although the lengths of the time series are short (420 ka) for detecting 100 kyr eccentricity cycles, the phase relationships support those obtained by Shackleton [2000]. Antarctic temperature and the Iberian Margin alcohol ratios (C26OH/(C26OH + C29)) lead eccentricity maxima by 6 kyr, with lower ratios (increased oxygenation) occurring at eccentricity maxima. CO2, CH4, and Iberian SST are nearly in phase with eccentricity, and minimum ice volume (as inferred from Pacific d18Oseawater) lags eccentricity maxima by 10 kyr. The phase relationships derived in this study continue to support a potential role of the Earth's carbon cycle in contributing to the 100 kyr cycle.
PurposeRecords of past climate and ocean circulation derived from marine sediments. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations.
Dataset Citation
  • Cite as: Hodell, D.A.; Crowhurst, S.; Skinner, L.C.; Tzedakis, P.C.; Margari, V.; Channell, J.E.T.; Kamenov, G.D.; Maclachlan, S.; Rothwell, G. (2013-12-18): NOAA/WDS Paleoclimatology - Iberian Margin 420KYr Geochemical and Color Variations Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/8kz8-v888. Accessed [date].
  • Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
Cited Authors
  • Hodell, D.A.
  • Crowhurst, S.
  • Skinner, L.C.
  • Tzedakis, P.C.
  • Margari, V.
  • Channell, J.E.T.
  • Kamenov, G.D.
  • Maclachlan, S.
  • Rothwell, G.
Originators
  • Hodell, D.A.
  • Crowhurst, S.
  • Skinner, L.C.
  • Tzedakis, P.C.
  • Margari, V.
  • Channell, J.E.T.
  • Kamenov, G.D.
  • Maclachlan, S.
  • Rothwell, G.
Publishers
  • NOAA National Centers for Environmental Information
Theme keywordsGlobal Change Master Directory (GCMD) Science Keywords
  • Earth Science > Paleoclimate > Ocean/Lake Records
  • Earth Science > Climate Indicators > Paleoclimate Indicators > Ocean/Lake Records
Global Change Master Directory (GCMD) Science Keywords
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > climate reconstructions|paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleocean > physical properties
  • earth science > paleoclimate > paleocean > biomarkers
  • earth science > paleoclimate > paleocean > oxygen isotopes
  • earth science > paleoclimate > paleocean > geochemistry
Paleoenvironmental Standard Terms (PaST) Thesaurus
  • What: age; Material: null
  • What: calcium/titanium; Material: sediment
  • What: barium; Material: sediment
  • What: alkenone; Material: null
  • What: lightness; Material: sediment
  • What: calcium/titanium; Material: sediment
  • What: reflectance; Material: sediment
  • What: depth; Material: null
  • What: depth; Material: null
  • What: delta 18O; Material: Globigerina bulloides
  • What: notes; Material: null
  • What: delta 18O; Material: benthic foraminifer
  • What: calcium/titanium; Material: sediment
  • What: red-green contrast; Material: sediment
  • What: sea surface temperature; Material: alkenone unsaturation index
  • What: calcium/titanium; Material: sediment
  • What: C37:4 alkenone; Material: null
  • What: calcium carbonate; Material: sediment
  • What: blue-yellow contrast; Material: sediment
Data Center keywordsGlobal Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Place keywords
  • Ocean > Atlantic Ocean > North Atlantic Ocean > MD01-2444 > LATITUDE 37.561333 > LONGITUDE -10.142167
  • Ocean > Atlantic Ocean > North Atlantic Ocean > MD01-2443 > LATITUDE 37.8815 > LONGITUDE -10.1762
Use Constraints
  • Cite as: Hodell, D.A.; Crowhurst, S.; Skinner, L.C.; Tzedakis, P.C.; Margari, V.; Channell, J.E.T.; Kamenov, G.D.; Maclachlan, S.; Rothwell, G. (2013-12-18): NOAA/WDS Paleoclimatology - Iberian Margin 420KYr Geochemical and Color Variations Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/8kz8-v888. Accessed [date].
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
  • Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
Access Constraints
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
  • None
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Last Modified: 2024-04-04
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